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Finding the Fourth Proportional to 69,920.84, 96,491.42 and 39,706.79

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Solution

The fourth proportional to 69,920.84, 96,491.42 and 39,706.79 is: 54,795.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,920.84 : 96,491.42 = 39,706.79 : x
  2. Step 2: Convert to fraction form
    69,920.84/96,491.42 = 39,706.79/x
  3. Step 3: Cross multiply
    69,920.84x = 96,491.42 × 39,706.79
  4. Step 4: Simplify right side
    69,920.84x = 3,831,363,869.75
  5. Step 5: Solve for x
    x = 3,831,363,869.75/69,920.84
  6. Step 6: Final answer
    x = 54,795.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.